<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>内部样式</title>
    <!--在<head>标签中控制样式-->

    <style>
        div{
            color:cadetblue;
            font-size: 20px;
        }



    </style>
</head>
    <body>
    <div>div1</div>
    <div>div2</div>
    <div>div3</div>


    </body>
</html>